Answer:
P = 11666.6 W
Explanation:
Given that,
Work done by the motor, W = 3500 kJ
Time, t = 5 min = 300 s
We need to find the power developed by the motor. Power developed is given by :
So, the required power is 11666.6 W.
Velocity and acceleration are vector quantities whereas speed, temperature and age are not.
<h3>What is a vector quantity?</h3>
Vector is a quantity that has both magnitude and direction and is represented by an arrow whose direction is same as that of the quantity and length is proportional to the quantity's magnitude.
Vector has magnitude and direction but it does not have position. Velocity and acceleration both are vector quantities as they have magnitude and direction.
If the speed of an object remains same but direction changes then the object is accelerating. It is important to remember that acceleration and velocity aren't always in the same direction.
To know more about vector quantity, refer
brainly.com/question/626479
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<h2>
Answer: B. False</h2>
Explanation:
According to Bernoulli's principle:
<em>"In an ideal fluid (not viscous and without friction) that circulates through a closed conduit, the energy the fluid possesses remains constant along its path."
</em>
From there, Bernoulli deduced that the fluid pressure decreases when the flow rate increases. <u>And this has nothing to do with depth.
</u>
<u>
</u>
To understand it better:
In a fluid that circulates through a closed conduit (a pipe for example), it contains energy in two ways:
-Kinetic energy due to its <u>weigh</u>t and <u>speed.
</u>
-Potential energy in the form of <u>pressure.
</u>
Now, if the system has constant flow and the total energy (kinetic + potential) is also constant, <u>the energy is transformed every time the transverse area of the tube is modified.
</u>
It should be noted that by modifying this transverse area, the flow rate is also modified.
Therefore, <u>as the kinetic energy increases or decreases, this change is compensated by the decrease or increase in pressure</u> (potential energy), since the total energy of the system cannot be created or destroyed.
Answer:
Negative acceleration
Explanation:
Let us assume a vehicle is moving with a constant velocity u and then it comes to a sudden stop.
The initial velocity of the vehicle is u and finally it comes to rest, it means final velocity is 0.
As we know that,
Acceleration is equal to change in velocity divided by time taken.
We can see that the value of acceleration is negative. Hence, it leads to negative acceleration.
